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Script to attach latest files of directories in a mail.

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Top Forums Shell Programming and Scripting Script to attach latest files of directories in a mail.
# 8  
Old 01-23-2018
A good practice is to use && after cd command.
This will stop your script from executing further if a directory is not accessible by means of permissions, problems with hardware etc.

Take the following example, where 2 bytes of code (&&) handle a dozen of possible error scenarios.
Code:
root@machine:~# cat somescript.sh 
#!/bin/sh
loc=/my/files/dumpp # this location does not exist due to human error inputing additional 'p'
cd $loc
printf "%s\n" "my start dir is $PWD which is not expected but i will happily execute relative find.." 
FILE=`find . | tail -5` 
root@machine:~# ./somescript.sh 
./somescript.sh : 3: cd: can't cd to /my/files/dumpp
my start dir is /root which is not expected, but i will happily execute relative find..
root@machine:~# cat handle.sh 
#!/bin/sh
loc=/my/files/dumpp # this location does not exist due to human error inputing additional 'p'
cd $loc &&
printf "%s\n" "my start dir is $PWD which is not expected but i never reached this line" 
FILE=`find . | tail -5` 
root@machine:~# ./handle.sh 
./handle.sh: 3: cd: can't cd to /my/files/dumpp

Hope that helps
Regards
Peasant.
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LEARN ABOUT OSX

shar

SHAR(1) 						    BSD General Commands Manual 						   SHAR(1)

NAME

     shar -- create a shell archive of files

SYNOPSIS

     shar file ...

DESCRIPTION

     shar writes an sh(1) shell script to the standard output which will recreate the file hierarchy specified by the command line operands.
     Directories will be recreated and must be specified before the files they contain (the find(1) utility does this correctly).

     shar is normally used for distributing files by ftp(1) or mail(1).

SEE ALSO

     compress(1), mail(1), tar(1), uuencode(1)

BUGS

     shar makes no provisions for special types of files or files containing magic characters.

EXAMPLES

     To create a shell archive of the program ls(1) and mail it to Rick:

	   cd ls
	   shar `find . -print` |  mail -s "ls source" rick

     To recreate the program directory:

	   mkdir ls
	   cd ls
	   ...
	   <delete header lines and examine mailed archive>
	   ...
	   sh archive

HISTORY

     The shar command appears in 4.4BSD.

SECURITY CONSIDERATIONS

     It is easy to insert trojan horses into shar files.  It is strongly recommended that all shell archive files be examined before running them
     through sh(1).  Archives produced using this implementation of shar may be easily examined with the command:

	   egrep -v '^[X#]' shar.file

4.4BSD								   June 6, 1993 							    4.4BSD